Page 203 - 《水资源与水工程学报》2022年第1期
P. 203

!33 " ! 1 #                       & ' ( ) & * + , -                               Vol.33No.1
               2022 $ 2 %               JournalofWaterResources&WaterEngineering                 Feb.,2022

            DOI:10.11705/j.issn.1672-643X.2022.01.28


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              Influenceofsuperlargedeepfoundationpitexcavationonthedeformationof
                                surroundingenvironmentandcountermeasures

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                         DONGLihu,SONGDanqing,TANGGaojie,JINYuan,WANGHaitao
               (1.SchoolofElectricalEngineering,ShenyangUniversityofTechnology,Shenyang110870,China;2.StateKeyLaboratoryof
               HydroscienceandEngineering ,TsinghuaUniversity,Beijing100084,China;3.ChinaConstructionFifthEngineeringDivision
               Co. ,Ltd.,Changsha410000,China;4ChinaNuclearIndustryZhongyuanConstructionCo.,Ltd.,Beijing100142,China)
                 Abstract:Inordertoinvestigatetheinfluenceofsuperlargecomplexdeepfoundationpitexcavationon
                 thesurroundingenvironmentaldeformation ,takingtheLonghuFinanceIslandprojectinZhengzhouCity,
                 HenanProvinceasanexample,thetotalstationmeterwasusedtomonitorthesupportingpiletop,thein
                 ternalsupportinggridcolumnsandthegroundsurfaceoutsidethepit,andthemultipointdisplacement
                 meterwasusedtosurveytheslopeofthesoilaroundthesupportingpile.Andthenthespatiotemporale
                 volutioncharacteristicsofdisplacementofsurroundingbuildingsnearthefoundationpitwasanalyzedto
                 investigatethecoordinationofthesupportingpile ,externalsoilmassandthefoundationpitdeformation.
                 Theresearchresultsshowthatthesettlementanddeformationcharacteristicsofthesupportingstructure
                 andsurroundingbuildingscanbedividedintofourstagesintheexcavationprocessofthefoundationpit ,
                 namelyearthworkexcavation,cushionconstruction,internalsupportremovalandcushioncompletion.
                 Duringtheearthworkexcavationandinternalsupportremovalstage,thesettlementdeformationofthe
                 supportingpiletop,theinternalsupportinggridcolumnsandthesurroundinggroundislarge,andthe
                 cushionconstructionhasaweakeningeffectonthefoundationpitdeformation.Inthestagesofearthwork
                 excavation ,cushionconstructionandinternalsupportremoval,theunevensettlementbetweenadjacent
                 gridcolumnsincreasesthedeformationofthecolumns.Theexcavationmainlyaffectsthesettlementde
                 formationoftheadjacentpipegallery,whichacceleratesthedeformationofthegalleryintheincipient

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